General inquiries

Sales & Support

Service hours (CET)

Fritz Kübler GmbH

Monday - Thursday: 7.30 am to 5.00 pm
Friday: 7.30 am to 4.00 pm


Encoders Incremental


  • Wear-free
  • Space and cost savings
  • Contactless
  • 3.600 ppr incremental
  • Max 30 mm hollow shaft, through
  • Max 1" hollow shaft, through
TTL / RS422

Bearingless encoder for shaft diameter up to 30 mm.

Thanks to its installation depth of only 16 mm, the bearingless magnetic rotary encoder RI20 / Limes LI20, comprising a magnetic ring and sensor head, is ideally suited for plants and machinery where space is very tight. The noncontact measuring principle allows for error-free use even under harsh environmental conditions, as well as ensuring a long service life.
For outdoor use with extremely sturdy aluminum housing and stainless steel cover, wide temperature range as well as a UV-resistant cable. IP68 / IP69k protection, special encapsulation technology and tested resistance to cyclic humidity and damp heat offer the highest levels of reliability, even in exposed outdoor use.

Shaft type 8 mm hollow shaft, through
10 mm hollow shaft, through
12 mm hollow shaft, through
15 mm hollow shaft, through
18 mm hollow shaft, through
20 mm hollow shaft, through
25 mm hollow shaft, through
30 mm hollow shaft, through
3/8 " hollow shaft, through
5/8 " hollow shaft, through
1 " hollow shaft, through
Working temperature -20 °C ... +80 °C
Protection level IP67
Connection types Radial cable
Max. rotational speed 12.000 min-1
Weight 200 g
Scanning magnetic
Resolution max. 3.600 ppr incremental
Power supply 4,8...26 V DC
4,8...30 V DC
Interfaces Gegentakt
TTL / RS422
Resistant and insensitive
  • High shock and vibration resistance.
  • Sturdy housing with IP67 protection, optionally with special housing for high resistance against condensation (IP68 / IP69k, resistance against cyclic humidity per EN 60068-3-38 as well as humidity and heat per EN 60068-3-78).
  • Contactless and wear-free measuring system for long service life.
Fast commissioning
  • Requires very little installation space.
  • Large mounting tolerance between magnetic ring and sensor head.
  • Easy adjustment by mounting via slotted holes.
  • Function indication by LED.
Data sheet


PDF ∼ 409,8 KB | 01.2023
Installation manual

LI20, LI50, RLI20, RLI50

PDF ∼ 329,5 KB | 12.2016

Safety characteristics


Multilingual: German, English
PDF ∼ 194,1 KB | 06.2019

Declaration of conformity

LI20 / RI20 / RLI20 / RLI200 / LI50 / RI50 / RLI50 / RLI500 CE

Multilingual: German, English, French
PDF ∼ 353,6 KB | 05.2017

Electronic CAD / ePlan


ZIP ∼ 794,3 KB | 02.2020


Safety instructions for magnetic rings

Multilingual: German, English, French, Italian, Spanish
PDF ∼ 566,2 KB | 05.2017


Cables and connectors

„Do you have technical questions about Kübler encoders or are you looking for individual solutions? We at Application Support are here for you.“

Rainer Grueninger
Application support
Rainer Grueninger
Application Engineer
+49 7720 3903 849

„We will be pleased to give you information about prices and delivery times. We are looking forward to your inquiry.“

Fritz Kübler GmbH
Fritz Kübler GmbH
Sales Germany
+49 7720 3903 871
+49 7720 21564